KEK Theory Seminar (Dr. Hiromasa Takaura)

Abstract

（ABSTRACT）

The strong coupling constant αs is a fundamental parameter in the standard model and requires to be determined with higher accuracy. We determine αs from static QCD potential with a new method where a renormalon uncertainty, which is an inevitable error in perturbative predictions, is subtracted from a theoretical prediction. We obtain αs(MZ^2)=0.1178+0.0016/-0.0015, which is consistent with the PDG result.

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